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Stability of pressurized long inelastic cylinders under radial transverse loads

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Abstract

In the present paper, the structural capacity of relatively thick inelastic steel cylindrical tubes under external or internal pressure and concentrated radial loads is investigated, through a rigorous finite element analysis, as well as using a simplified analytical model. For zero pressure, the tubes exhibit inelastic cross-sectional deformation and are capable of dissipating a significant amount of plastic energy. The energy absorption capacity, as well as the ultimate transverse load, are reduced in the presence of external pressure. The effects of internal pressure are also examined. Results are reported in the form of load-deflection curves for different pressure levels. In addition, collapse envelops showing the interaction of pressure versus radial transverse loads are presented. The conclusions of this study are important for the structural integrity of cylindrical steel tubulars for pipeline and other offshore applications.

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Author notes

  1. S. A. Karamanos

    Present address: Institute of Structural Analysis and Aseismic Research, National Technical University, Athens, Greece

Authors and Affiliations

  1. Steel and Timber Structures, Faculty of Civil Engineering Delft University of Technology NL-2628 CN, Delft, The Netherlands

    S. A. Karamanos

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  1. S. A. Karamanos
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Communicated by D. Beskos, 13 May 1996

Computer facilities for the present study were provided by the Department of Civil Engineering, at the National Technical University of Athens (NTUA). The author would like to thank Prof. Manolis Papadrakakis (NTUA) and Prof. Jaap Wardenier (T.U. Delft) for their support and encouragement.

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Karamanos, S.A. Stability of pressurized long inelastic cylinders under radial transverse loads. Computational Mechanics 18, 444–453 (1996). https://doi.org/10.1007/BF00350252

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